I set the trim about halfway between the top of the white arc and the nose up limit on final. This accomplishes a few things:
1. verifies that my trim is actually set where I expect it to be. I've seen misrigged and malfunctioning trim indicators in old planes, newer planes with the electronic trim and flap displays and even in G1000 Mooneys. It's not common but it could really get you in a pickle.
2. re-inforces the fact that, if you're fast, you need to get slowed. If my control of pitch attitude is suspect a mile from the runway, how well does that bode for rounding out and flaring? If you're too fast on final, you actually have to give the yoke a little forward pressure. That's a good check against what I'm seeing outside and what my MP setting and fuel flow.
3. Known quantity to work from on every landing
From there, I add nose up trim as necessary as I reduce power crossing the fence and pulling the power smoothly to idle as I round out. With some CG loading the trim ends up at full nose up but usually it doesn't. I don't like it full nose up because it can make a go around a headache.
FWIW, I rarely ever fly the same airplane and fly many that are new-to-me. I carry a fair amount of skepticism any time I get in a plane and try my best to not trust them. Perhaps it would be different if I flew one bird regularly.